array([14, 33, 27, 11, 12, 27, 26, 25, 27, 27, 22, 36, 37, 3, 23, 7, 25,
17, 36, 31, 30, 22, 20, 29, 23])
With thanks to John Rauser: Statistics Without the Agonizing Pain
Teaching statistics by way of mathematics is like teaching philosophy by way of ancient Greek
(Paraphrased from Wallis and Roberts (1956)).
Cobb (2007)
From Mosquito, beer dataset.
array([14, 33, 27, 11, 12, 27, 26, 25, 27, 27, 22, 36, 37, 3, 23, 7, 25,
17, 36, 31, 30, 22, 20, 29, 23])
Mean of beer values is: 23.60
Mean of water values is: 19.17
Mean difference is: 4.43
Null means “not any”.
Define a world in which the difference of interest is set to zero.
The two samples have been drawn from the same underlying population.
Or:
There is not any difference in the population from which
beerhas been drawn, and the population from whichwaterhas been drawn.
Edvard Munch “Scream”, photo by Richard Mortel, licensed with CC-By.
More information.